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Old 03-20-07, 07:24 AM   #14 (permalink)
LPB
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Join Date: Mar 2002
Location: Massachusetts
Posts: 4,147


Car 1: 1992 Seattle Silver LS CPE
Car 2: 2007 Toyota Corolla
Car 3: 1981 Corvette



iTrader: (2)
A failing VSS will also cause erratic tach function. My symptom happened when cruise was engaged. For no apparent reason the cruise cut-out, and both the RPMs and Speedometer reading suddenly decreased. No blinking D4. Replaced VSS and symptom has never again occurred.

If you have a blinking D4 a code has been set. Retrieve the code.
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